Hoisting apparatus.



No. 657,689. Patented sepff. n, |900.

H. c. BEHH.

HISTING APPARATUS.

(Application led May 2, 1899.) v

(No Model.)

tin-ritten rellti Patenti* @erica HANS c. einen, or SAN irnANcisoo,oAtinonn r e centimes, or onioAeo, itmnois.r

nois'rinenemnnrne,

"Assn-mondje FRASER',

SEEGXFIGATICN forming part of Letters Patent No. 657,689, datectepternieei Li 1, i900,

Application led May' 2, 1899. Serial No. 715.297. @lo model.) l

To 11N 1li/mm'. mrt/y corr/cern:

Be ithnown `that l, HANS C. citizen of the United States, residingfin the city andy county of San Francisco, in the State of Galt fornia,have invented certain nevi and nsetul improvements in HoistingApparatns; and l do hereby declare that the following afnll, clear, and exact description thereof.

The present invention relates to certain io new and .useful improvementsjn hoisting machinery for use in connection with the working of mines or such where the hoistingl rope 0r cable winds off an'don onel or more drums; and it consistsinore especially in certain imi'5 proveniente in the hoisting mechanism fully net forth and described in Letters Patent No. 627,769, granted to me on the 27th da5,7 of June, 1899, for improved hoisting! machinery.

ln my aforesaid Letters Patent No. 627,769 zo means are provided for relieving the sheaves and' the hoisting-rope of the nndne wear resultine,r vby reasonof the side ,or lateral deviation of the winding rope or cable as the same ie Wound oil? or on the hoisting drum-or V drums; but lfhe devices therein described do not provide for relieving the carriage, upon which the drnin-sheave is mounted, of the lateral etrainincident to the pull of the cable or hoist rope.

The object of the present invention is to compensate, so to speak, for such lateral strains and so arrange that the pit-sheave and the drnin-slieave will move or swing in unison "with the lateral deviation of the hoist rope or cable in order to adjust their plane of rota tion, so as to coincide with the deviation of the rope or cable between, While at the saine time relieving the traveling carriage of the drum-sheave of undue friction due to the pull 4o of the hoistrope or cable.

In order to comprehend the invention, reference should be had to the accompanying sheet of drawings, forming a part of this plication, wherein-f Figure l is a side View in elevation. 2 is a top plan view of the mechanism illustrated in Fig. l, and Fig. 3 is a detail front view of the swiveling mechanism for the pitsheave.

In' the drawings the letterA is used to in diente a suitable galloweframe and -tfeem pit-sheave arranged Within or in close prox- -i imity to thegailows-fraine- A short distance from said lframe is located the Winding or hoisting drum B,\vhich is mounted upon suitable supports and above or in close proximity to this drum is arranged a traveling sheave B2, which directs the rope or cable C to the drum B, said rope or cable being the hoisting rope or cable leading up from the shaft and over the pit-head sheave C down to and over the sheaves A and B2. These parte ar'e substantiallythe same in Working` and arrangement the corresponding partsi'uliy i set forth and ldescribed in my former application, Serial No. l,Sl5. Hence detail description thereof in not deemed necessary in the. present application.

For the purpose of relieving the carriage C2, above which the sheave B2 is mounted, of the lateral strain due tothe pull ot" the rope or cable C the pit-sheave A' and traveling gnide-eheave B2 are mounted at opposite ends of the same girder-frame D, which acts as a strut to resist the pull of the rope between the sheaves. Close to the hoisting-drum this frame is traversed by suitable mechanism,

eo as to maintain the edge of the guide-sheave B2 approximately in a Fixed plane tangent to the Winding :side ci the hoisting-drum, swing ing at the same time about a point near its other'end. For this purpose/the girder-frame D is supported and swiveled at a at its lower end upon carriage or truck C2, the carriagetrncli being traversed on suitable rails b by menne oit' the screw b or other suitable v in echan icm The rew b'is shown supported in bearings h2, and the same is driven by the change-caring d d2 from the axis of the drum or any part rotating with the drum. This operating-screw engages the nut e at the side of the carril-ige or truck C2. lf the ewiveling-point is not in line of the rope leading` from the gn to the drum, lint a little distance aan of( it, then the tract; or rails Zi on which 1e carriage or truck Q2 traversed should be slightly curvedin ei'der .to keep the rope or cable leading edge of the .guidesheave at all positions in its travel. strictly within the lifted plane tangent to the Winding' side or face of the drum B. In practice, hcivever, the amount by which the rope or cable leading edge of the guide-sheave is carried away from this fixed plane is so slight with a straight track that the latter gives in most cases a sufficiently-correct approximation to the matheniatically-eorrect path of the sheave edge. The otherend of the gir-derframe opposite to that carrying the guidesheave and supporting the pit-sheave A is flexibly connected or hinged at a to the links D2. which links are likewise hinged at their lower end to the swivel-pin D3 free to turn about a vertical axis. By thus pivotally connecting the upperend of the girder-frame to a swivel-pin bya connection capable of movement at rightI angles to the direction within which the truck or carriage C2 moves with the laying oif or on of the rope upon the hoistdruni the lateral swing of the guide-sheave andlower end of the girder-frame is compensated for at its u pper' end, or, in other words, the upper end of said girder-frame is permit ted suicient longitudinal movement so that the end near the drum will the path prescribed by the track upon which the truck C2 is traversed.

While I have shown and described the shea ve A as a pit-sheave from which the rope or eable is led to a sheave C', acting as a pit head sheave which-leads the rope or cable to the pit, it isobvious that said sheave A may serve as the pit-head sheave, asfillustrated in Figs. l and 2 of the draw-ings contained in my former application,l Serial' No.. 704,815, above referred to. y

By connecting the upper and lower sheaves by a rigid struetu re pivotally monnted, so as to have movement at each end,A the said sheaves will move or swing in unison .with the travel or movement of carriage or truck C2 and said carriage or truck be relievedot' `the undue friction to which it is subjected 'by the lateral strain due to th'e poll of the cable or rope where the sheaves are mounted to swing be able to follow independently of each other. The dispos-ition and arrangement of the sheaves as thus described prevent the vertical swinging and sagging ot" the hoisting-rope rubbing against the flanges ot" the sheaves, for the reason that the sheaves rotate in the saine plane as the sag of the rope.

Having thus described my invention, what I claim as new, and desire to secure protection in by Letters Patent, is-

1. The combination with the windingalru in,

of a truck or carriage arranged in close proximity theretma sheave-frazne pivoted at eah end, a rope-sheave mounted at each end of said frame, and of means whereby the -arriage is caused to travel lengthwise of the winding-drum in ord-er that the rope-leading edge 0f the sheave mounted at such end oi` therfrznne shall- 'rnove within a plane tangent to the winding face or side of the drum in correspondence with the laying on or oi of the rope or cable.

2. The combination with the Winding-d rum, of the pit-sheave, a guide-sheave located a distame therein-nn, a rigid connection be-y tween said sheaves, a longitudinally-movable device to whichv the upper end of the frame is flexibly oonneeted, a laterally-movable carringe to which the said frame is pivot ally connected at its lower end, and of mechanism for causing the saidcarriage to traverse the winding-drum with the laying on or oi of the rope or cable so that the rope-leading edge of the guide-sheave mounted wit-hin the frame will' move Within a piane tangent to the windingface of the drum.

In testimony whereof I hereunto affix my signature, in presence of two witnesses, this 27th dayfof April, 1899.

HANS C. BEHR. Witnesses:

WALTER F. VANE, D. R- RICHARDS. 

